We extend Vind's classical theorem on the measure of blocking coalitions valid in finite dimensional atomless economies … general class of Aubin coalitions for which a suitable version of Grodal's result ([17]) is also formulated. Our results wish … to point out the relevance of cone conditions dealing with blocking coalitions of arbitrary measure or weight. …

>) core characterizations of a continuum economy may fail in this general informational setting. However, under mild … coalition according to the rule. We then focus on information mechanisms based on the size of coalitions and provide a general … to each member of specific coalitions. We prove that the resulting cores are exactly the same independently of whether …

compared in this paper with the solutions with the property of ?-core stability. Key instruments for that comparison are the … as they result from unacceptable, i.e. unstable imputations. The relation between internal and core stable solutions is … exist. But this class of games is more restricted than the one for which only ?-core solutions exist. The argument is first …

timing of the coalitions of firms yield very di¤erent results on the set of allocations which are core-stable. We then … introduce the concept of core in games with externalities. We show that different assumptions on the behaviour as well as on the …

A coalitional matching is a two-sided matching problem in which agents on each side of the market may form coalitions … would like to learn from. In this setup, we examine how the existence of core stable partitions on the distinct market sides … respect common rankings shape the existence of core stable coalitional matchings. …

An evolutionary style model of recontracting is given which guarantees convergence to core allocations of an underlying …

coalitions of firms yield very different results on the set of allocations which are core-stable. We then consider the stability … concept of core in oligopoly games. We show that different assumptions on the behaviour as well as on the timing of the …

characterize the core as a function of the utility's parameter values and show that in all cases the corresponding cores are non …-empty. We further discuss the core stable outcomes in terms of their segregating versus integrating properties. …

neither arbitrarily small coalitions nor large coalitions are enough to block an allocation which is not in the core, due to … the core provided by Vind and Schmeidler (1972) to economies with asymmetrically informed traders. We then focus on … information sharing rules based on the coalitions' size. Assuming the existence of coalitions to which the sharing rule associates …